78408670 has 8 divisors (see below), whose sum is σ = 141135624. Its totient is φ = 31363464.

The previous prime is 78408619. The next prime is 78408719. The reversal of 78408670 is 7680487.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×78408670² = 12295839062337800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3920424 + ... + 3920443.

It is an arithmetic number, because the mean of its divisors is an integer number (17641953).

Almost surely, 2^78408670 is an apocalyptic number.

78408670 is a deficient number, since it is larger than the sum of its proper divisors (62726954).

78408670 is a wasteful number, since it uses less digits than its factorization.

78408670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7840874.

The product of its (nonzero) digits is 75264, while the sum is 40.

The square root of 78408670 is about 8854.8670232816. The cubic root of 78408670 is about 428.0107685007.

The spelling of 78408670 in words is "seventy-eight million, four hundred eight thousand, six hundred seventy".